From c47117f43ae0a97c0e7fb01b488b1f25d59e99ef Mon Sep 17 00:00:00 2001
From: Andriy Gapon <avg@FreeBSD.org>
Date: Thu, 8 Sep 2016 12:24:46 +0000
Subject: [PATCH] intpm: do not try attaching to unsupported controller
 revisions

While there set a different device description for the controllers
found in various FCHs (Hudson, Bolton, CPU integrated).

MFC after:	1 week
---
 sys/dev/intpm/intpm.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/sys/dev/intpm/intpm.c b/sys/dev/intpm/intpm.c
index aaeb3d0f864..c520d8927fb 100644
--- a/sys/dev/intpm/intpm.c
+++ b/sys/dev/intpm/intpm.c
@@ -104,9 +104,12 @@ intsmb_probe(device_t dev)
 		device_set_desc(dev, "ATI IXP400 SMBus Controller");
 		break;
 	case 0x43851002:
-	case 0x780b1022:	/* AMD Hudson */
-		device_set_desc(dev, "AMD SB600/7xx/8xx SMBus Controller");
-		/* XXX Maybe force polling right here? */
+		device_set_desc(dev, "AMD SB600/7xx/8xx/9xx SMBus Controller");
+		break;
+	case 0x780b1022:	/* AMD FCH */
+		if (pci_get_revid(dev) < 0x40)
+			return (ENXIO);
+		device_set_desc(dev, "AMD FCH SMBus Controller");
 		break;
 	default:
 		return (ENXIO);